简单的qt界面设计。界面上至少有启动照相机、拍照、停止拍照三个功能按钮，另外还有一个退出按钮，用来关闭程序；另外还需要安排采集到的图像的显示位置。-Qt simple interface design. Interface at least start the camera, take pictures, stop taking pictures of three function buttons, plus an exit button to close the program also n